Nissan Versa (N17): P1148 closed loop control

Nissan Versa 2nd generation (N17) Service Manual / Engine / Engine control system (EC) / P1148 closed loop control

DTC Logic

DTC DETECTION LOGIC

NOTE: DTC P1148 is displayed with DTC for A/F sensor 1.

When the DTC is detected, perform the trouble diagnosis of DTC corresponding to A/F sensor 1.

DTC No. Trouble diagnosis (Trouble diagnosis content) DTC detecting condition Possible cause
P1148 CLOSED LOOP-B1 (Closed loop control function) The closed loop control function does not operate even when vehicle is being driven in the specified condition.
  • Harness or connectors (A/F sensor 1 circuit is open or shorted.)
  • A/F sensor 1
  • A/F sensor 1 heater

Diagnosis Procedure

DTC P1148 is displayed with DTC for A/F sensor 1.

When the DTC is detected, perform the trouble diagnosis of DTC corresponding to A/F sensor 1.

Refer to EC, "DTC Index".

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Other materials:

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Output speed sensor
Exploded View 1. Transaxle assembly 2. Output speed sensor 3. O-ring Front Genuine NISSAN CVT Fluid NS-3 Removal and Installation REMOVAL Disconnect the harness connector from output speed sensor. NOTE: Lift up the vehicle and perform the work from rear of the transaxle asse ...

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